SU971620A1 - Method for actively controlling production process - Google Patents

Description

(5) METHOD OF ACTIVE CONTROL OF TECHNICAL PROCESS

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The invention relates to the field of control of machining conditions with non-stationary cutting elements and can be used on automatic lines, machine tools with software and adaptive control,

A known method of controlling the cutting process during machining is based on receiving and analyzing the parameters of the wave processes of mechanical processing, for example, the emission of electromagnetic radiation stress waves generated in the cutting zone 13.

The main disadvantage of this method is the impossibility of its use in machining conditions with non-stationary cutting elements on complex-automated equipment,

The aim of the invention is to improve the accuracy of active diagnostics.

machining conditions (i.e. obtaining reliable information substantiated parameters of the machining process for its control, optimization and control) - with non-stationary cutting elements.

To achieve this goal, the values of the cutting elements are determined by the values of physicotechnological parameters measured in the process of cutting, which do not correlate with controlled technological parameters, by means of the dependencies embedded in it, and values of the parameters of wave processes, which are compared with the values of parameters of wave processes obtained from the cutting zone in the process of processing, and by their ratio judge the state of the controlled technologists mechanical parameters of the process of machining.

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The method of active diagnostics VIY of machining with non-stationary cutting elements is based on the fact that they compare values of wave process parameters containing information on controlled technological parameters of a machining process with reference values of wave process parameters that do not contain information on controlled technological parameters of a machining process, with reference values parameters of wave processes that do not contain information about controlled technological parameters that are based on the dependencies laid down in the memory of the electronic computer, as well as on the basis of the physicotechnological parameters of the processing process that are not correlated with controlled parameters about

For the technical implementation of the method, a device has been developed in which sensors of physical and technological parameters are connected to a unit for generating their values, which is connected to an analog information converter into digital, while the output of the analog information converter to digital is connected to the input of a computer with memory, the output of the electronic computer soy, - "

There is a dinene with a digital-to-analog converter, which is connected to a comparison device, which is connected to a recording device, and the second input of a comparison device is connected to a wave process parameterization unit, which is connected to wave process sensors.

The drawing shows a block diagram of a device for active diagnostics of machining conditions with non-stationary cutting elements, the principle of which is based on an analysis using an electronic computer that has a memory, the values of physical and technological parameters, and the determination of its dependencies on an electronic computer. m values of parameters of wave processes (not containing information about the technological process being monitored; parameters, since such physical and technological parameters were chosen which do not correlate with controlled technological parameters) and comparing the latter with the values of the parameters of wave processes obtained during processing and, therefore, containing information about the controlled technological parameters ;, the proposed method is carried out as follows

During processing, the values of physicotechnological parameters (for example, the tangential component of the cutting force) that are not corrected with controlled technological parameters (for example, tool wear) are measured; an electronic computer determines the values of non-stationary cutting elements (for example, depth of cut) and the electronic computer, according to the dependencies laid down on it, for example, determines the values of parameters of wave processes (for example, the emission of stress waves) ) which still do not contain information about the controlled technological parameters (tool wear) and which are compared with the values of the parameters of wave processes (emission of stress waves) obtained from the cutting zone during processing and therefore containing information on the monitored technological parameters (tool wear) and by their ratio, the state of the monitored technological parameters (tool wear) of the machining process under the conditions of non-stationary cutting elements (for example, modified by the program during processing depth of cut).

The device works as follows about

The sensors of the physico-technological parameters 1 receive information in analog form at the input of the block forming the values of the physico-technological parameters 2, from the output of which the information goes to the analog information to digital converter 3, after which the information goes to the input of the electronic computer with memory 5 From the output of the electronic computer k information in digital form is fed to the input of the digital to analog information converter 6, and then to the input

comparing device 7, the second input of which receives the values of wave process parameters in analog form from block 2, containing information about the monitored technological parameters and the result of the comparison goes to recording device 8, which can be used with an H-327 type recorder with a number of channels, respectively the number of controlled technological parameters of the process of machining. The wave process sensors 9 installed near the cutting zone receive information and convert it into electrical signals that arrive at the input of the wave process value generation unit 10. The invention improves the accuracy and reliability of information about machining conditions, makes active diagnostics of machining conditions on automatic lines, machine tools with pro rpaMMHbW and adaptive control in the presence of non-stationary elements of cutting and expand technological capabilities, so that You can simultaneously monitor several process parameters

machining o1 on one or several machines in the polling mode.

Claims (1)

Invention Formula A method for actively controlling a technological process, for example, a cutting tool state, including measuring parameters of wave processes generated in the cutting zone and characterizing mechanical processing, characterized in that, in order to improve accuracy under conditions of non-stationary varying processing conditions, such physical measurements are additionally measured. technological parameters of the process, which depend on non-stationary varying processing modes and do not correlate with controlled process parameters, according to known dependencies m calculate the values of the parameters of wave processes, compare the obtained values with the measured values of the parameters of wave processes and according to their ratio. judge on the state of the technical process. Sources of information taken into account during the examination. Author's certificate of the USSR, according to the application H 29 SOBZ / 25-28, cl. B 23 Q 15/00,